GSBS

Overview

GSBS is a self-hosted game-save sync and backup service for players who use Windows, Linux, or macOS across more than one device. It is a strong fit for mixed-platform setups, especially those involving a Steam Deck, provided you are willing to run a central server.

Its game-aware syncing and version history make it more than a folder-sync tool, but protecting save contents requires enabling optional end-to-end encryption.

Key features

Sync that accounts for running games

The client scans Steam, Epic, GOG, Ubisoft, EA, Xbox, Heroic, Lutris, Bottles, and Prism against a PCGamingWiki manifest. It waits for a detected game to close before syncing, reducing the risk of changing a save while the game is using it. Windows and Linux save paths are translated, including Proton paths, which makes GSBS particularly useful for a PC-and-Steam-Deck mix.

History and recovery

Save files are versioned and can be restored manually from the web dashboard. That gives players a route back from an unwanted change, while leaving the choice of version to them rather than implying automatic recovery.

Encryption and backups

Optional end-to-end encryption uses client-side AES-256-GCM with Argon2id, so the server receives ciphertext for encrypted saves. Without it, save contents remain plaintext on the server and in backups; users who keep a server or backup storage outside their control should enable encryption.

Scheduled tar.zst snapshots can include the database, keys, and saves, and can be stored on local disk or S3. Webhook, Discord, and ntfy notifications cover conflicts, quota, new devices, backups, and stale devices. The web interface also provides an OpenAPI specification at /api/openapi.json.

Deployment and security trade-offs

The project recommends Docker Compose for server deployment and provides a Windows server setup executable. Its security policy asks users to report vulnerabilities privately to the maintainer and says reports are acknowledged within 72 hours. Installers and binaries are not code-signed or notarized, so users who rely on signed software distribution may prefer another option.

Pricing

GSBS is free, with a free plan and no paid tiers or plan-specific quotas described. Its cost is operational rather than subscription-based: users need to provide and maintain the central server and any backup storage they choose. That suits technically comfortable players seeking multi-device sync without a software subscription; it is less compelling for anyone who wants a managed hosted service.

Platforms

Clients are available for Windows, Linux—including Flatpak and arm64—and macOS. The service also provides a web interface and API, and supports self-hosting. This combination covers desktop and laptop setups as well as Steam Deck use through Linux, while requiring a server deployment to coordinate devices.

Who it's for

GSBS is best for players with several computers or a Steam Deck who want game-aware syncing, cross-platform save paths, and recoverable history under their own server setup. It is a poor fit for people who want a fully managed service or do not want responsibility for server security and backups. Anyone using it should make a deliberate choice about encryption: plaintext saves in server storage and snapshots are a meaningful privacy risk.

Pros and cons

• Pro: It defers syncing until detected games close, avoiding intervention in a live save.
• Pro: Windows/Linux path translation, including Proton, suits mixed desktop and Steam Deck libraries.
• Pro: Versioned saves can be restored manually from the web dashboard.
• Pro: Scheduled snapshots can include the database, keys, and saves and target local disk or S3.
• Con: Save data is plaintext on the server and in backups unless end-to-end encryption is enabled.
• Con: Self-hosting puts server deployment and storage upkeep on the user.
• Con: Unsigned, unnotarized installers and binaries may deter users who expect signed software.

Alternatives

Browse Game Save Managers to compare options by category. Choose Checkpoint64 if its freemium setup and published Free and Pro tiers suit your team-based use; its Free tier is limited to 20 MiB per space, one team, three friend teams to join, and three read-only fans.

Game Save Genie is another free, self-hosted option for Linux, macOS, and Windows that uses your own cloud storage. Hoard is a freemium alternative for Linux, macOS, Windows, and self-hosting, credited as a solo-developed project.

Ludusavi is worth considering if a free, MIT-licensed portable executable for Windows, Linux, or Mac fits better. EmuSync is a free option for Linux and Windows with no subscription or paywall.

Game Backup Monitor is free and open source for Linux and Windows, with unlimited games and 7-Zip compression; cloud use requires a provider and sync client.

Gamekeeper is a Windows freemium alternative whose free Multi-Space use is limited to three spaces per game and whose cloud storage supports local, FTP, SFTP, WebDAV, SMB/CIFS, and S3.

Verdict

Choose GSBS if you want cross-platform, game-aware save sync with versioned recovery and are prepared to run the server yourself. Its standout advantage is the combination of live-game deferral and Windows/Linux path translation; its main reason to look elsewhere is the operational burden and the need to enable encryption to keep saves out of plaintext server storage and backups.